Mitsubishi RM115A-21 is a drive control PCB / CPU board offered for replacement enquiries involving compatible Mitsubishi drive units. The photographed assembly includes processing ICs, a long multipin connector, stacked D-sub connectors and an upright digital-display daughterboard.

The board carries the full RM115A-21 identification and the additional PCB number BC886A028G51. A separate RM115 base marking and MADE IN JAPAN text are also visible. Match the complete model, board number and original drive nameplate before ordering.

RM115A-21 Product Information

RM115A-21 and BC886A028G51 Identification

Use RM115A-21 as the primary enquiry reference and retain the -21 suffix. Include BC886A028G51 and clear photographs of all labels. A shared PCB number or the shorter RM115 marking does not establish interchangeability with RM115A-22 or another configuration. Firmware and revision requirements must be checked against the original drive.

Fitted Connectors and Unpopulated Positions

The photographs show the fitted connector row, the long connector on the opposite edge and several unpopulated connector footprints. Compare the installed connectors and keying with the original board; printed labels at unused positions do not indicate that additional ports are supplied. Check the board outline, mounting holes and clearance for the upright display daughterboard.

Replacement Configuration and Supply Scope

Confirm whether the quotation includes the main PCB and the fitted display daughterboard shown. Provide the complete drive nameplate, photographs of both board sides and any existing alarm information. A qualified technician should verify the board version, required configuration and any data backup or restoration procedure specified for the original equipment.

Follow the drive's instructions for power isolation and capacitor discharge, verify absence of voltage and use anti-static protection during replacement. Send the required quantity, preferred condition and delivery country for a quotation. Actual-unit photographs and testing details can be confirmed before shipment.

Related products: Mitsubishi PCB boards and Mitsubishi drive units.